Roller reciprocating valve.



Patented Nov. 28, |899.

J. sTAE.

' RULLER RECIPHOCATING VALVE.

(Application tiled Oct. 22, 1898.)

(No Model.)

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NTTED STATES PATENT OFFICE.

JACOB STABE, OF CLEVELAND, OHIO.

ROLLER RECIPROCATING VALVE.

SPECIFICATION forming part of Letters Patent No. 637,835, dated November 28, 1899.

Application filed October 22, 1898. Serial No. 694,338. (No model.)

To a/ZZ whom t may concern:

Be it known that I, JACOB STABE, residing at Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Roller Reciprocating Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable ot-hers skilled in the art to which it pertains to make and use the same.

My invention relates to a roller reciprocating valve and valve casing or chest designed more especially for use in steam-engines.

The primary object of my invention is to avoid the necessity of lubrication.

With this object in view, and to the end of realizing other advantages hereinafter appearing, my invention consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure I is a side elevation, mostly in central vertical section, of a steam-cylinder and a steam-chest and valve embodying my invention. Fig. Il is a vertical section on either one of lines II II, Fig. I, looking in the direction of the arrow. Fig. III is a vertical section on line III III, Fig. I.

Referring to the drawings, A designates a steam-cylinder, and a the piston within the cylinder.

C represents the steam-chest or valve-casing, and B the valve within the chest or casing.

D designates the wall between the valvecasings chamber YC' and the cylinders chamber A. Wall D is provided, in the usual manner, with an exhaust-port d at its central portion, and the ports d' and d2, that connect with opposite ends, respectively, of the cylinders chamber, extend in the usual manner through the said wall D a suitable distance apart longitudinally of the casing and cylinder and at opposite sides, respectively, of the exhaust-port. Casing C is provided at any suitable point with a steam -inlet C2. The valve-facing side D of wall D forms an inner bearing or seat for the valve, and the opposite internal Wall D2 of the valve-casing forms an ou ter bearing for myimproved valve,that comprises suitablysupported rollers that are suitably arranged transversely of the chamber C' between the aforesaid walls D and D2.

The valve illustrated comprises in its construction two parallel side bars or plates b and Z9', extending longitudinally of the valves path and arranged a suitable distance apart transversely of the chamber C' and at oppositeV sides, respectively, of the ports. Two corresponding sets of peripherally and longitudinally toothed or corrugated rollers are arranged between and at right angles to the said plates or bars and a suitable distance apart longitudinally of the bars or plates. Each set of rollers in the case illustrated comprises three rollers R' R2 R3, relatively arranged in end elevation as the angles of a triangle. All of the rollers tit between the opposing inner sides of the plates or bars b h as snugly as possible Without interfering with their operation and have their teeth extending from end to end. Two, R R2, of the rollers of each set of rollers engage the ported wall between the chest or valve-casing C and the cylinder, but are separated the distance required to prevent mesh between them, and the valve-bearing-forming surface D of the said wall is correspondingly toothed or corrugated transversely and the full width of the path Vof the engaging rollers and is in mesh with the engaging rollers of each set of rollers and extends the full length of the travel of the said rollers. The remaining roller R5 of each set of rollers meshes with the separated rollers R R2 of the said set of rollers and engages the valve-bearing forming or inner surface of the valve-casings wall D2, that, as already indicated, is opposite the aforesaid ported Wall between the valve-casing and the cylinder and is correspondingly toothed or corrugated, as required, to mesh with the engaging rollers, and lthe said outer toothed or corrugated wall extends the full width of the path of the engaging-rollers and the full length of the travel of the said rollers. The outer roller R3 of each set of rollers is preferably larger to facilitate the rolling operation or travel of the valve. The two inner rollers R' R2 of each set of rollers are trunnioned, as at R, in the roller-supporting plates or bars, and the engaging outer roller R3, if the toothed construction is employed,

need not havetrunnions. The valve-rod B is attached to the roller-carrying bars or plates b b in any approved manner. The two sets of rollers are arranged the distance apart required to form between them a chamber?n large enough only to cover one of the cylinder-chamber-connecting ports and the exhanst-port at the same time. The sets of rollers, the outer toothed wall, and the rollercarrying plates or bars form the walls of the said chamber and prevent communication between the chamber and the steam-space surrounding the valve. The roller-carrying plates or bars snugly overlap, therefore, as at Z22, the side or longitudinal edge of the toothed or corrugated walls of the valve-casing, so as to very etfectually close the chamber r at the sides of the valve. The inner rollers of each set of rollers are arranged the distance apart required to give the desired lap to the valve. The corrugated or toothed walls of the valvecasings chamber are formed, preferably, by plates rendered stationary in any approved manner and removably secured in place by screws D3 or other means.

The plates b and b', in addition to their connection to the valve-rod, are preferably tied or connected together by any suitable number of suitably-applied rods b3.

What I claim4 isl. A valve of the character indicated, comprising parallel rollers arranged transversely of the valve and in two sets that are arranged thedistance apart required to form the porteovering chamber between them and have, respectively, rollers arranged to form the lap of the valve, and two bars or plates arranged at opposite ends, respectively, of and carrying the rollers and closing the aforesaid chan1- ber at the sides.

2. In a valve of the character indicated, two bars or plates arranged a suitable distance apart and longitudinally of the valve, rollers extending transversely of the valve between the said plates or bars and arranged in two sets that are arranged the distance apart required to form the port-covering chamber between them, each set comprising three parallel rollers relatively arranged in end elevation as the angles of a triangle, two of the rollers of each set of rollers being arranged at the inner side of the valve and the distance apart required to form the lap of the valve, and the third or remaining roller of each set of rollers being arranged with its axis intermediate but outside of the axes of the inner rollers of the said set of rollers and engaging with the said inner rollers, substantially as and for the purpose set forth.

3. In a valve of the character indicated, two bars or plates arranged a suitable distance apart and longitudinally of the valve, longitudinally toothed or corrugated rollers arranged in two sets that are arranged the disJ tance apart required to form the port-c0ver ing chamber between them, each set comprising three parallel rollers relatively arranged in end elevation as the angles of a triangle, two of the rollers of each set of rollers being arranged at the inner side of the valve and the distance apart required to form the lap of the valve and trunnioned in the aforesaid side members, and the remaining'roller of each set of rollers arranged at the valves outer side and meshing with the inner rollers of the said set of rollers.

4. The combination with the ported cylinder-connecting wall and opposite Wall of a valve casing or chest of the character indicated: of the valve within the chest and comprising rollers engaging the last-mentioned wall, and other rollers engaging the aforesaid ported wall and arranged as required to form the lap of the valve,and bars or plates carrying the rollers, and the rollers and the aforesaid plates or bars having` the relative arrangement required to form the port-covering chamber of the valve.

5. The combination with the valve casing or chest having the ported wall D and the opposite wall D2 comprising plates arranged longitudinally of the chest or casing: of the valve comprising the following: rollers engaging and arranged transversely of the plate of the last-mentioned wall; other rollers engaging with the first-mentioned rollers and engaging, also, with the plate of the ported wall, and arranged as required to form the lap of the valve, and bars carrying the rollers and overlapping the side or longitudinal edges of the aforesaid plates, substantially as and for the purpose set forth.

6. The combination with the valve casing or chest C having the ported wall-D and the opposite wall D2 comprising plates that are toothed or corrugated transversely of the chest; of the valve comprising the following: correspondingly peripherally toothed or corrugated rollers meshing with the toothed or corrugated plate of the last-mentioned wall, other correspondingly peripherally toothed or corrugated rollers meshing with the firstmentioned rollers and meshing, also, with the toothed or corrugated plate of the ported wall, and arranged as required to form the lap of the valve, and side bars carrying the rollers and overlapping the side or longitudinal edges of the aforesaid plates, substantially as shown, for the purpose specified.

Signed by me at Cleveland, Ohio, this 28th day of September, 1898.

JACOB STABE.

Witnesses:

C. H. DORER, A. H. PARRATT.

IOO

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